Extrinsic Muscles (Osu Cvm 2018)

Front 1

Back 1

Superficial Pectoral

Descending part

Front 2

Back 2

Superficial Pectoral

Transverse part

Front 3

Back 3

Deep Pectoral

Front 4

Descending superficial pectoral origin

Back 4

first sternebra

Front 5

descending superficial pectoral insertion

Back 5

crest of greater tubercle of humerous

Front 6

superficial pectoral action

Back 6

adduct limb when not bearing weight

prevent limb from being abducted when bearing weight

Front 7

transverse superficial pectoral origin

Back 7

first 2-3 sternebrae and fibrous raphe between adjacent muscles

Front 8

transverse superficial pectoral insertion

Back 8

crest of greater tubercle of humerous

Front 9

deep pectoral origin

Back 9

ventral part of sternum

fibrous raphe between deep pectoral muscles

deep abdominal fascia in the region of the xiphoid cartilage

Front 10

deep pectoral insertion

Back 10

main part: lesser tubercle of humerous

lesser parts: greater tubercle and crest by an aponeuosis, caudal part inserts on medial brachial fascia

Front 11

deep pectoral action

Back 11

when limb is advanced and fixed, pulls trunk cranially

when limb is not supporting weight, draws limb caudally

adducts limb

supports trunk

Front 12

Back 12

Superficial pectorals

Front 13

Back 13

Deep Pectorals

Front 14

Back 14

A. pectoantebrachialis

B. Xiphihumeralis

Front 15

Back 15

B. Brachiocephalicus

1. Cleidomastoideus

2. Cleidocervicalis

3. Clavicular Intersection

4. Cleidobrachialis

Front 16

Back 16

Clavicular intersection

Front 17

Back 17

Cleidobrachialis (Brachiocephalicus)

Front 18

Back 18

Cleidochephalicus (Brachiocephalicus)

Front 19

Back 19

Cleidomastoideus (Brachiocephalicus)

Front 20

Brachiocephalicus Cleidocephalicus Cleidomastoideus Origin

Back 20

Clavicular intersection

Front 21

Brachiocephalicus Cleidocephalicus Cleidocervicalis Origin

Back 21

Clavicular intersection

Front 22

Brachiocephalicus Cleidobrachialis Origin

Back 22

Clavicular intersection

Front 23

Brachiocephalicus Cleidocephalicus Cleidomastoideus Insertion

Back 23

Mastoid part of temporal bone of skull

Front 24

Brachiocephalicus Cleidocephalicus Cleidocervicalis Insertion

Back 24

cranial half of median raphe of neck

Front 25

Brachiocephalicus Cleidobrachialis Insertion

Back 25

distal end of cranial border of humerous (dog)

medial surface of ulna (cat)

fascial attachment to axilla

Front 26

Brachicephalicus Action

Back 26

advance limb

extends shoulder joint

draws neck from side to side

Front 27

Back 27

A. Cleidocephalicus

B. Cervical intersection

C. Cleidobrachialis

Front 28

Back 28

D. Sternocephalicus

1. Sterno-occipitalis

2. Sternomastoideus

Front 29

Back 29

Sternocephalicus

A. Sterno-occipitalis

B. Sternomastoideus

Front 30

Sternocephalicus Sterno-occipitalis Origin

Back 30

First stenebra (manubrium)

Front 31

Sternocephalicus Sterno-occipitalis Insertion

Back 31

Nuchal cresst of occipital bone of skull

Front 32

Sternocephalicus action

Back 32

draw head and neck to the side

Front 33

Sternocephalicus Mastoideus Origin

Back 33

First sternebra (manubrian)

Front 34

Sternocephalicus Mastoideus Insertion

Back 34

Mastoid part of temporal bone of skull

Front 35

Back 35

Sternocephalicus

Front 36

Back 36

Sternohyoideus

Front 37

Back 37

A. Sternothyroideus

B. Sternohyoideus

C. Sternocephalicus

Front 38

Sternohyoideus Origin

Back 38

First sternebra (manubrium) and first costal cartilage

Front 39

Sternohyoideus Insertion

Back 39

Basihyoid bone

Front 40

Sternohyoideus Action

Back 40

draw larynx and tongue caudally

Front 41

Sternothyroideus Origin

Back 41

First Costal Cartilage

Front 42

Sternothyroideus Insertion

Back 42

Caudolateral surface of thyroid cartilage

Front 43

Sternothyroideus action

Back 43

draw larynx and tongue caudally

Front 44

Back 44

Omotransversarius

Front 45

Back 45

1. Trapezius

2. Omotransversarius

Front 46

Back 46

Omotransversarius

Front 47

Back 47

Omotransversarius

Front 48

Omotransversarius Origin

Back 48

Distal end of spine of scapula and acromion

Front 49

Omotransversarius Insertion

Back 49

Wing of atlas

basioccipital bone, near tympanic bulla (cat)

Front 50

Omotransversarius Action

Back 50

advance limb

flex neck laterally

Front 51

Back 51

A. Trapezius

B. Cervical Part

C. Thoracic Part

Front 52

Trapezius Cervical Part Origin

Back 52

Median raphe of neck

Front 53

Trapezius Insertion

Back 53

Spine of Scapula

Front 54

1. Trapezius cervicis action

2. Trapezius thoracis action

3. together

Back 54

1. draw scapula dorsocranially

2. draw scapula dorsocaudally

3. both together: elevate and abduct forearm

Front 55

Trapezius Thoracic part Origin

Back 55

Spurapinous ligament to level of 9th thoracic vertebra

Front 56

Back 56

B. Rhomboideus

1. Rhomboideus Capitis

2. Rhomboideus Cervicis

3. Rhomboideus Thoracis

Front 57

Back 57

A. Rhomboideus Capitis

B. Rhomboideus Cervicis

C. Rhomboideus Thoracis

Front 58

Back 58

1. Rhomboideus

A. Capitis

B. Cervicis

C. Thoracis

2. Trapezius

Front 59

Rhomboideus Insertion

Back 59

dorsal border and adjacent surfaces of scapula

Front 60

Rhomboideus action

Back 60

elevate forelimb and draw scapula against trunk

Front 61

Rhomboideus capitis origin

Back 61

nuchal crest of occipital bone

Front 62

Romboideus cervicis origin

Back 62

median fibrous raphe of neck

Front 63

Romboideus thoracis origin

Back 63

spinous processes of first seven thoracic vertebrae

Front 64

Back 64

Latissimus dorsi

Front 65

Back 65

1. Latissimus dorsi

2. Thoracolumbar fascia

Front 66

Latissimus dorsi origin

Back 66

Thoracolumbar fascia (T7-L7 in dogs, T4-L6 in cats)

Muscular attachment to last 2 or 3 ribs

Front 67

Latissimus dorsi insertion

Back 67

teres major tuberosity of humerus and teres major tendon

Front 68

Lattisimus dorsi action

Back 68

draw limb caudally

flex shoulder joint

Front 69

Back 69

Serratus ventralis

Front 70

Back 70

D. Serratus ventralis

1. Cervicis part

2. Thoracis part

Front 71

Back 71

A. Scapula

B. Trapezius

C. Rhomboideus

D. Serratus ventralis

E. Deep pectorals

Front 72

Serratus ventralis cervicis origin

Back 72

transverse processes of 2nd to 7th cervical vertebrae

Front 73

Serratus ventralis thoracis origin

Back 73

first 7 or 8 ribs ventral to their middle (dog)

first 9-10 ribs (cat)

Front 74

Serratus ventralis insertion

Back 74

dorsomedial third of scapula (serrated face)

Front 75

Serratus ventralis action

Back 75

support trunk

depress scapula

Front 76

pecotantebrachialis origin

Back 76

manubrium

Front 77

pectoantebrachialis insertion

Back 77

antebrachium: superficial fascia on proximal end of the antebrachium, attaches to ulna

Front 78

pectoantebrachialis action

Back 78

draws limb medially (adducts)

Front 79

xiphihumeralis origin

Back 79

xiphoid process

Front 80

xiphihumeralis insertion

Back 80

humerous: long thin tendon on proximal end of humerous deep to insertion of deep pectoral muscle

Front 81

Superficial pectoral innervation

Back 81

cranial pectoral nn.

Front 82

Deep pectoral innervation

Back 82

caudal pectoral nn.

Front 83

Brachiocephalicus innervation

Back 83

accessory n.

ventral branches of cervical spinal nn.

Front 84

Omotransversarius innervation

Back 84

Accessory n.

Front 85

Trapezius innervation

Back 85

Accessory n.

Front 86

Rhomboideus innervtion

Back 86

ventral brs. of cervical AND thoracic spinal nn.

Front 87

Latissimus dorsi innervation

Back 87

thoracodorsal n.

Front 88

Seratus ventralis innervation

Back 88

ventral brs of cervical spinal nn.

long thoracic n.

Front 89

Sternocephalicus innervation

Back 89

accessory n.

ventral brs. of cervical spinal nn.

Front 90

Sternohyoideus innervation

Back 90

ventral brs. of cervical spinal nn.

Front 91

Sternothyroideus innervation

Back 91

ventral brs. of cervical spinal nn.